若路由器的路由信息如下，则最后一行路由信息怎样得到的（）。

R3#show ip route

Gateway of last resort is not set

192.168.0.0/24 is subnetted, 6 subnets

C 192.168.1.0 is directly connected, Ethernet0

C 192.168.65.0 is directly connected, Serial0

C 192.168.67.0 is directly connected, Serial1

R 192.168.69.0 [120/1] via 192.168.67.2, 00:00:15, Serial1

[120/1] via 192.168.65.2, 00:00:24, Serial0

R 192.168.69.0 [120/1] via 192.168.67.2, 00:00:15, Serial1

R 192.168.69.0 [120/1] via 192.168.652, 00:00:24, Serial0

A．串行口直接连接的

B．由路由协议发现的

C．操作员手工配置的

D．以太网端口直连的